Mask



FIG. 1 is an enlarged front perspective view of a mask according to afirst embodiment of our new design;

FIG. 2 is an enlarged reverse perspective view thereof;

FIG. 3 is an enlarged front view thereof;

FIG. 4 is an enlarged rear view thereof;

FIG. 5 is an enlarged top view thereof;

FIG. 6 is an enlarged bottom view thereof;

FIG. 7 is an enlarged left side view thereof;

FIG. 8 is an enlarged right side view thereof;

FIG. 9 is an enlarged front perspective view of a mask according to asecond embodiment of our new design;

FIG. 10 is an enlarged reverse perspective view thereof;

FIG. 11 is an enlarged front view thereof;

FIG. 12 is an enlarged rear view thereof;

FIG. 13 is an enlarged top view thereof;

FIG. 14 is an enlarged bottom view thereof;

FIG. 15 is an enlarged left side view thereof; and

FIG. 16 is an enlarged right side view thereof.

FIG. 17 is a front perspective view of a mask according to the firstembodiment of our new design;

FIG. 18 is a reverse perspective view thereof;

FIG. 19 is a front view thereof;

FIG. 20 is a rear view thereof;

FIG. 21 is a top view thereof;

FIG. 22 is a bottom view thereof;

FIG. 23 is a left side view thereof;

FIG. 24 is a right side view thereof;

FIG. 25 is a front perspective view of a mask according to the secondembodiment of our new design;

FIG. 26 is a reverse perspective view thereof;

FIG. 27 is a front view thereof;

FIG. 28 is a rear view thereof;

FIG. 29 is a top view thereof;

FIG. 30 is a bottom view thereof;

FIG. 31 is a left side view thereof; and,

FIG. 32 is a right side view thereof.

The broken lines indicate unclaimed structure or environment and do notform a part of the claimed design.

CLAIM The ornamental design for a mask, as shown and described.